Pneumatic spring.



ALONZO C. MATHER, OF CHICAGO, ILLINOIS.

PNEUMATIC SPRING.

Specification of Letters Patent.

katenteol April 16, 1907.

Application filed August 22,1906. Serial No. 331,572.

To all whom it may concern.-

Be it known that L'ALonzo C. MATHER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pneumatic Springs, of which the following is a specification.

My invention relates to improvements in a pneumatic spring for vehicles, and is particularly adapted for railway-cars.

The object ofmy invention is to make certain improvements in the construction of parts for holding the pneumatic s ring and. for attaching the same to the carody and the truck. H

A further object of my invention is to provide coil-springs to take. the weight of the 1 car-body in case the pneumatic spring should the drawings.

collapse.

Referring to the drawings, Figure 1 is a sectional plan view taken below the car-body and showing my neumatic s ring attached to the truck. Fig.2 is a si e elevation of Fig. 1. Fig. 3 isa vertical section as on line 3 -75, Fig. 1. Fig. 4 is a horizontal sectional view as on line 4 4, Fig. 3.

, In the drawings, 1 represents the truck of a railway-car, having sills 2 and cross-pieces 3. The pneumatic spring 4-consists of a flexible tube made of rubber or any other flexible material. An inner tube may or may not be used, as desired. 1 The pneumatic spring 4 is an endless circular tube which rests upon a disk 5, mounted on the truck. Upon said pneumatic spring rests an angle-plate 6, secured to the car-body, which is not shown in The disk 5 and the angleplate 6 are circular inform and are mounted concentric with the king-bolt ofthe truck.

The disk 5 is provided with an annular rib 7, which fits into an annular groove 8, formed by the projecting ribs 9 and 10 on the plate 11, which is circular in form and is bolted to the truck. Bolts 12 extend through the projecting ribs 9 and 10, in which the said bolts are loosely mounted, so that they act as rollers to relieve the friction between the disk 5 ing part of the angle-plate 6. The angleplate 6 is thus held in its proper position.

To permit of a slight rotary movement between the anglelate and the cylindrical rib 14, I provide rol ers 16 to relieve the friction between said parts. These rollers stand vertically and travel in short spaces 17, formed by cutting recesses or depressions in both the cylindrical rib 14 and the dependingplate 15, as shown in Figs. 1 and 4.

The disk 5 is provided with a series of coilsprings 18, which are shorter. than the diameter of the pnehmatic spring 4, so that they will not contactwith the angle-plate 6 unless the pneumatic spring should colla se, in which case the Weight of the car will be carried by the coil-springs. The said coilsprings are held in place upon the disk 5 by bolts 19, having large flat .heads 20. said bolts work loosely. in a ertures in the disk 5, so that the spring may e contracted.

By constructing the parts in the above manner the body of the car and the truck .are held securely together and cannot get out of place. The rollers between the disk on the truck and the angle-plate 6 on the car -Wlll'l6ll6V6 the car of the lateral vibration of the truck, while the pneumatic spring will relieve the car of all other vibration and jolting.

Having thus described \my invention, I claim and desire to secure by Letters Patent I 1. The combination of a pneumatic spring, an angle-plate resting upon said pneumatic spring, a disk supporting said pneumatic spring, a cylindrica flange on said disk engaging a depending flange on said angleplate, and means for interposing said parts between the body and truck of a car, sub-- stantially as described.

2. The combination of a pneumatic spring,

an angle-platere'sting uponsaid pneumatic spring, a disk supporting said pneumatic spring, a cylindrical flange-on said disk, a depending flange fitting around said cylindrical flange, rollers mounted between said cylindrical flange and said depending disk and means for interposing said parts between the body and truck of a car, substantially as described.

3. The combination of a pneumatic spring, an angle-plate above said spring carrying the body of a. car, a disk below the said pneumatic spring secured to the truck, and coil- (siprings to separate said angle-plate and said sk, substantially as described;

4. The combination'of a pneumatic spring,

The

liudrical rib on said disk around which fits Z an angle-plate-ab0ve said pneumatic spring I the same to said disk, substantially as de- :0 adapted to be secured to the body of a car, scribed.

:1 depending flange on said ai'lgle- 'dnte, a disk In testimony whereof I affix my signature below said pneumatic spring, means for sei in presenee of two Witnesses.

curing said disk to the truek of a can, a ey- I ALONZO C MATHER.

W'itnesses:

HERBERT H. BARNES, A. B. MATI-IER.

the said depending flange, rollers located be T tween 8211C]. depending flange and said cyhndrleal rib, coil-springs, and bolts to secure 

